If you close the Windows client from outside of the game it kills the game window, but the game process may keep running headless in the background. Happens 100% of the time if you kill it while it loads.

If you then start the game again without having manually killed the headless client first it loads a second client, which won't read your existing config.ini but will happily overwrite it with a fresh one, destroying all existing settings in it.

This has been a problem for some time. We'll take a look, but it might be awhile.

set config.ini to read only